Veteran lawmaker Koichi Kato, victim of an arson attack on one of his houses last week following his criticism of Prime Minister Junichiro Koizumi's visits to Yasukuni Shrine, is warning that signs of "dangerous" nationalism are increasing in Japan.

Kato, a former secretary general of the dominant Liberal Democratic Party, also voiced concerns in an interview Friday that diplomatic policies presented by Chief Cabinet Secretary Shinzo Abe, the most likely candidate to succeed Koizumi, are "too naive."

"In today's Japan, I see a kind of aggressive nationalism without repentance (of Japan's militarism before and during World War II) like, 'We did nothing wrong in the last war,' " Kato said.